Police said Reagan was the one who placed the initial emergency call to police.

Nesci, a former Los Angeles Police Department officer turned criminal defense attorney, had her own reality show on the Sundance Channel called "Loredana, ESQ."

According to the show, the couple was in the process of renovating their home and was struggling with mounting bills.

The victim's brothers, who are in law enforcement, say despite arguments between the couple, they never saw this coming.

"My brother and I were never concerned because there was no indication or predictive factors for any escalation of violence," said Sal Nesci.

In a statement released Friday afternoon, Shepard Kopp, Reagan's attorney, said Nesci, an "exceptionally strong" body builder, attacked his client with a hunting knife in the midst of a domestic dispute.

"While defending himself against her assault with a deadly weapon, [Reagan] tried to disarm her, and in the intense struggle that ensued she tragically suffered a fatal wound. While [Reagan] is not guilty of committing any criminal offense, he is devastated by this horrible event," he said.

If convicted, Reagan faces a possible maximum sentence of 26 years to life in state prison.